Bi(Mg0.5Ti0.5)O3 addition induced high recoverable energy-storage density and excellent electrical properties in lead-free Na0.5Bi0.5TiO3-based thick films. Issue 2 (February 2019)

• Record Type: Journal Article
• Authors: Wang, Jiaheng; Li, Yong; Sun, Ningning; Du, Jinhua; Zhang, Qiwei; Hao, Xihong
• Is Part Of: Journal of the European Ceramic Society. Volume 39:Issue 2/3(2019)
• Page Start: 255
• Page End: 263
• Publication Date: 2019-02
• Subjects: NBT-BMT thick films -- Dielectric property -- Sol-gel -- Energy-storage performances; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2018.10.008
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: (1-x)Na0.5 Bi0.5 TiO3 -xBi(Mg0.5 Ti0.5 )O3 (NBT-BMT) thick films were designed for achieving large recoverable energy-storage density ( W rec ). A large W rec of 40.4 J/cm 3 was detected in the thick film for x = 0.4, which was more than 4 times larger than that of the pure NBT film. The addition of BMT induced slim polarization hysteresis ( P - E ) loops at room temperature. The slim P - E loops improved the difference between the maximum polarization ( P max ) and the remnant polarization ( P r ). Besides, a breakdown strength field ( BDS ) of 2440 kV/cm was also detected in the thick film for x = 0.4. The high BDS was caused by the reduced leakage current density. Furthermore, the thick film for x = 0.4 possessed superior energy-storage stability under different temperature, frequency and electric-field cycling. In addition, 90% of the pulsed discharge energy density could be released in less than 1100 ns by using a pulsed discharge measurement.